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The true worth of an experimenter consists in his pursuing not only what he seeks in his experiment, but also what he did not seek.

I never experiment with anything in my books. Experimentation means you don't know what you're doing.

If you do an experiment and it gives you what you did not expect, it is a discovery.

I don't think that somebody who is observing or predicting behavior should also be participating in the 'experiment.'

Exploring the unknown requires tolerating uncertainty.

Scientists who play by someone else's rules don't have much chance of making discoveries.

If a scientist is not befuddled by what they're looking at, then they're not a research scientist.

In teaching man, experimental science results in lessening his pride more and more by proving to him every day that primary causes, like the objective reality of things, will be hidden from him forever and that he can only know relations.